Central-draft incandescent oil-lamp.



G. BLANKENBURG.

CENTRAL DRAFT INGANDESGENT OIL LAMP.

APPLICATION FILED JUNE 1, 1908.

Patented July 13, 1909.

3 SHEETS-SHEET 1.

G. BLANKENBURG.

CENTRAL DRAFT INGANDESGENT OIL LAMP.

APPLICATION FILED JUNE 1, 190a.

'2?,769, Patented July 13,1909.

3 SHEETS-SHEET 2.

G. BLANKENBURG.

CENTRAL DRAFT INOANDBSGENT OIL LAMP.

APPLIOATION FILED JUNE 1, 190B.

9%?!769. Patented July 13, 1909.

3 BHEETS-SHBET 3.

. UNITE STATES PATENT Prion.

CARL BLANKENBURG, OF LEIPZIG-SELLEBSHAUSEN, GERMANY, ASSIGNOR TO HUGO SCHNEIDER, ACTIENGESELLSCHAFT, OF LEIPZIG, GERMANY.

CENTRAL-DRAFT INCANDESCENT OIL-LAMP.

Specification of Letters Patent.

Patented July 13, 1909.

Application filed June 1, 1908. Serial No. 435,983.

To all whom it may concern:

Be it known that I, OARLBLANKENBURG, a subject of the King of Prussia, and resident of 13 Schl'itzenhaus strasse, Leipzig-Sellershausen, in the Kingdom of Saxony, German Empire, have invented certain new and useful Improvements in Central-Draft Incandescent Oil-Lamps, of which the following is an exact specification.

This invention relates to improvements in incandescent oil lamps and is a further development of the invention described in the s ecification of application Ser. No. 393031 ed by Carl Blankenburg on the 16th of September 1907.

The object of the present invention is to effect an'improvement in the operation of such lamps by 'providing means for still fuither preventing heating of the outer wick tu e.

The lamp is of the cen'tral draft type that is to say, air is led to the inner wick tube through a shaft or tube passing through the oil vessel.

The invention also comprises various improved details as hereinafter more fully explained with reference to the drawings and pointed out in the claims.

In the drawings Figure 1 is a view partially. in vertical section through a central draft incandescent oil lamp according to the present invention, Fig. 2 illustrates an outside view of the air draft sieve, the parts bein shown separated, Fig. 3 is a partial sectiona view showing the parts assembled and the holding means employed for retaining them in the assembled position, Fig. 4 is a view similar to Fig. 2 showing a modified form of air draft sieve and gallery separate, Fig. 5 is a view similar to -Fig. 3 showing these parts in theirassembled position. I

In carrying the invention into effect according to the form shown inFig. 1. oil is held in a container 0. which is provided with a central draft tube 12 to which air has access at the bottom as shown. by the arrows. Around the central draft tube b-which also forms the inner wick tube there is arranged the circular wick c. The wick c is caught by a preferably perforated tube 11 which may be moved up and down by means of a rotatable finger piece e, the spindle f of which carries a toothed wheel 9 gearing with a rack h connected to a pin j on the wick carrier tube d. The outer wick tube 7c contacts with'the wick at its upper end and then widens downwardly after which it extends downwardly with constant diameter to terminate in the upper part of the font or oil-holder a. Within the widened part of the tube is there is arranged an insulating tube .m surrounding the wick and forming with the tube is an insulating jacket extending over the exterior of the upper part of the wick from the point where the wick leaves the font or oil holder a. This air space may if desired be filled with any convenient heat insulating material. In the form illustrated however this air space is left free and the lower flange n of the insulating tube m is provided with small openings as shown so that air entering through the small hole 0 in ,the plug 1) of the oil holder can alsopass into the air space between the outer wick tube and the insulattube m. he parts just described are supported in a ni ple piece g which is screwed at 1 into the hol er a. This nip le' piece is also provided with a screw to which the outer airkdraft sieve s is attached. The outer air draft sieve will be, more particularly described with reference to Figs. 2 and 3. The sieve s is connected by a bayonet joint to the usual aller u. As in the form of my invention escribed in the application Ser. N 0. 393,031 the u er end of'the wick tube is is protecte rom the flame bymeans of a ring '0 which does not contact with the upper end of the outer wick tube but comes in contact with the wickat a point above the end of the wick tube. The air sieves is also arranged.

to form a gage for the upper limit of the wick.

Formed in one with the gallery there is the usual hood piece to through the central opening in which the perforated air sieve it on the central tube b passes. A socket y is also provided for the pur ose of holding the mantle su porting ro which is not illustrated. in the drawings.

The operation of this lamp is as follows: Air enters the central draft tube 1) and also 'passes'through the external air draft sieve s and mixes with the vapor rising from the wick. The vapor and air then pass in comany through the o ening of the burner ood w and burn wit a blue flame. This blue flame is directed to some extent to play against the meshes of the mantle by means of the central sieve a which acts as a spreader.

' In order to avoid the disadvantages which sieve part 6 so as to be moved up and down. i

. The articulating members consist of a bar 9 on which the ring 8 is fastened and which slidesin a guide 10 fixed on thewick tube k and a hooked'lever 12 which is fixed on a spindle sup orted on the sieve art 6 and adapted to be rotated bya hand e 11. The hooked lever 12 is adapted to engage between two ins'on the bar 9 and the hooked end of the ever catches one ofsaid ins in the raised position of the ring 8 to ho (1 said ring in an elevated position. In'this raised position the lever 12 acts as a strut; The upper sieve part 7 is provided with openings 14 in its outer-ring part through which the bayonet joint members 13 pass. The cylin- (ler gallery U, is alsoprovided with small openings or notches in its lower flange 15 to permit of the bayonet joint members '13 passing above the flange 15. A shoulder 16 is also provided on the flange 15. The parts are assembled by passing the upper sieve part 7 over the bayonet joint members or claws 13 and rotating till the said claws come to lie against the shoulders or projections 16. g

Instead of arranging the common bayonet joint for the upperpart 7 of the outer air draft sieve and the gallery u in the manner illustrated'in Figs. 2 and 3 I may-effectthis common jointing in the manner illustrated in Figs. 4 and 5. In this case the hook 13 is fastened directly to the lower part 6* of the outer air draft sieve and the part 7 a of the gallery it are" arranged exactly as described above.

I claim: Y

1. In combination, a central draft tube, a wick around said tube, an outer wick tube extending downwardly from near the u er end of said wick and widened, a tube wit in to form with the first mentioned outer wick said widened part and surrounding the wick 7 tube, a heat insulating jacket, a ring around r the wick at its upper en above the end of the wick tube and a supporting memberfor said ring, said supporting member extending downwardly to be fixedto the first 'rnentioned outer wick tube at itswidened'jacket part." i I 2. In combination with an incandescent oil burner, a lower sieve part arranged around and below the burner, bayonet joint members articulated tosaid lower sieve part, an

upper sieve part having openings adapted to pass the bayonet joint members, and a cylinv and means for raising and owering said ring.

4. In a central draft incandescent oil-lamp,

the combination ofa removable gallery for the lamp chimney, a separately removable air draft sieve part, a ring-supporting said.

gallery and sieve part, a common bayonetjoint connection for said and means for raising and owering said ring, comprising a guide bar fixed to said ring, a

arts to said ring hooked lever engaging said bar to move it and hold. it elevated.

In witness whereof I have hereunto set my hand in the presence OfjtWO witnesses.

- CARL BLANKENBURG;

Witnesses: I

1 MAX ZERoHE,

FRITZ I-II'JBNER. 

